Without any empirical matter of fact, and none likely on the near horizon, quantum gravity (QG) research has largely split off into distinct channels, each reflecting a different set of attitudes, and yes, philosophies directed towards the problem at hand. (See e.g., [1]} for a recent overview of some feasible experimental proposals.) But this state of affairs should not be entirely surprising. Solving the problem of QG should, after all, entail first addressing the issue of what QG even is — indeed, what is meant by quantum? What is meant by gravity? Which, if any, elements of Einstein's gravity, or the standard quantum formalism, should be abandoned in the transition to QG?
